1204880861 has 4 divisors (see below), whose sum is σ = 1230516672. Its totient is φ = 1179245052.

The previous prime is 1204880857. The next prime is 1204880869. The reversal of 1204880861 is 1680884021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1204880861 - 2² = 1204880857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204880869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12817835 + ... + 12817928.

It is an arithmetic number, because the mean of its divisors is an integer number (307629168).

Almost surely, 2^1204880861 is an apocalyptic number.

It is an amenable number.

1204880861 is a deficient number, since it is larger than the sum of its proper divisors (25635811).

1204880861 is an equidigital number, since it uses as much as digits as its factorization.

1204880861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25635810.

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 1204880861 is about 34711.3938210496. The cubic root of 1204880861 is about 1064.0973671072.

The spelling of 1204880861 in words is "one billion, two hundred four million, eight hundred eighty thousand, eight hundred sixty-one".